Size matters when it comes to extinction risk 动物的体型可能是决定其灭绝的关键因素_BBC

extinction risk 灭绝风险

emerged （经过观察、研究）出现了

at both ends of the scale （体型、重量等）处于两个极端的

heavyweights 重型动物

featherweights 羽量级动物，小型动物

ongoing 持续的

测验请听报道并回答下列问题。

1. What is the relationship between body mass and extinction risk that scientists found?

2. Why are featherweights losing their habitat?

3. What do the scientists say we should do about the wave of extinctions?

4. Which word in the text means 'a regular or repeated way in which something happens'?

答案 1. What is the relationship between body mass and extinction risk that scientists found?

Animals at both ends of the scale face bigger extinction risks than those in the middle.

2. Why are featherweights losing their habitat?

Featherweights are losing their vital habitat because the land is being cleared for development.

3. What do the scientists say we should do about the wave of extinctions?

Scientists say urgent action is needed on both fronts to help slow the ongoing wave of extinctions.

4. Which word in the text means 'a regular or repeated way in which something happens'?

Pattern.

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